From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 51B08CA9EC0 for ; Mon, 28 Oct 2019 15:27:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2510421783 for ; Mon, 28 Oct 2019 15:27:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="iDJlyFi6" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730004AbfJ1P1l (ORCPT ); Mon, 28 Oct 2019 11:27:41 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:48772 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726934AbfJ1P1l (ORCPT ); Mon, 28 Oct 2019 11:27:41 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=TTEv4W8oozb1gWNqqpwk26Sz/lbxVKo91oxaysVFQV4=; b=iDJlyFi6t4KKqj11MuF6fVB9I u+VFsX5qanBq9ubAwelo1QAfyKnCfenhvHIVCT/83qjODCCV5DaR5a7CVb8vW3WWGPduxdDolRVCc yHupX9BAqMJSe6yTT1V2mz7XhELKqqDMrrf2NUcqh8eCsSKkPAcF4DusQiWODrS2vBzzmNdX4LFdq 7urERu003XuPFQP8NERhqDXsxH4snvDlQwO7GkCVmuILvjbDIug2m04Kig4vaK6/7nalHu5bGxD3x tEkaUNGuD9ONYIJUCHeaj1X3M26MZ3YC4EzgowJfaJ2uEdny2lRwMf7qcjYEsLFHs3I7DVbsK+mzb fGH4ZvZCQ==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1iP6vh-0006ax-6W; Mon, 28 Oct 2019 15:27:37 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 406183040CB; Mon, 28 Oct 2019 16:26:35 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 6BB062B4468CB; Mon, 28 Oct 2019 16:27:35 +0100 (CET) Date: Mon, 28 Oct 2019 16:27:35 +0100 From: Peter Zijlstra To: Thara Gopinath Cc: mingo@redhat.com, ionela.voinescu@arm.com, vincent.guittot@linaro.org, rui.zhang@intel.com, edubezval@gmail.com, qperret@google.com, linux-kernel@vger.kernel.org, amit.kachhap@gmail.com, javi.merino@kernel.org, daniel.lezcano@linaro.org Subject: Re: [Patch v4 3/6] sched/fair: Enable CFS periodic tick to update thermal pressure Message-ID: <20191028152735.GC5671@hirez.programming.kicks-ass.net> References: <1571776465-29763-1-git-send-email-thara.gopinath@linaro.org> <1571776465-29763-4-git-send-email-thara.gopinath@linaro.org> <20191028152421.GD4097@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191028152421.GD4097@hirez.programming.kicks-ass.net> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Oct 28, 2019 at 04:24:21PM +0100, Peter Zijlstra wrote: > On Tue, Oct 22, 2019 at 04:34:22PM -0400, Thara Gopinath wrote: > > Introduce support in CFS periodic tick to trigger the process of > > computing average thermal pressure for a cpu. > > > > Signed-off-by: Thara Gopinath > > --- > > kernel/sched/fair.c | 5 +++++ > > 1 file changed, 5 insertions(+) > > > > diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c > > index 682a754..4f9c2cb 100644 > > --- a/kernel/sched/fair.c > > +++ b/kernel/sched/fair.c > > @@ -21,6 +21,7 @@ > > * Copyright (C) 2007 Red Hat, Inc., Peter Zijlstra > > */ > > #include "sched.h" > > +#include "thermal.h" > > > > #include > > > > @@ -7574,6 +7575,8 @@ static void update_blocked_averages(int cpu) > > done = false; > > > > update_blocked_load_status(rq, !done); > > + > > + trigger_thermal_pressure_average(rq); > > rq_unlock_irqrestore(rq, &rf); > > } > > This changes only 1 of the 2 implementations of > update_blocked_averages(). Also, how does this interact with > rq->has_blocked_load ? Specifically, I'm thikning this wants a line in others_have_blocked(): + if (READ_ONCE(rq->avg_thermal.load_avg)) + return true;